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Influence of temperature on growth, toxicity and carbohydrate production of a Japanese Ostreopsis ovata strain, a toxic-bloom-forming dinoflagellate

Vidyarathna, N. K. and Graneli, Edna LU (2011) In Aquatic Microbial Ecology 65(3). p.261-270
Abstract
Ostreopsis ovata is a benthic dinoflagellate that produces palytoxin and its analogues. Since the end of the 1990s, toxic blooms of O. ovata have been recorded in many tropical and temperate marine waters. These blooms often kill benthic invertebrates and cause health problems for humans. We hypothesize that increases in seawater temperature might induce these blooms. A strain of O. ovata isolated from the southern coast of Japan was selected for study. O. ovata cells were exposed to 7 different temperatures from 24 to 30 degrees C for 30 d, and growth rates were noted. The specific growth rate was found to be highest at 25 degrees C, next highest at 24 degrees C and lower at 26, 28, 27, 30 and 29 degrees C, in that order. The hypothesis... (More)
Ostreopsis ovata is a benthic dinoflagellate that produces palytoxin and its analogues. Since the end of the 1990s, toxic blooms of O. ovata have been recorded in many tropical and temperate marine waters. These blooms often kill benthic invertebrates and cause health problems for humans. We hypothesize that increases in seawater temperature might induce these blooms. A strain of O. ovata isolated from the southern coast of Japan was selected for study. O. ovata cells were exposed to 7 different temperatures from 24 to 30 degrees C for 30 d, and growth rates were noted. The specific growth rate was found to be highest at 25 degrees C, next highest at 24 degrees C and lower at 26, 28, 27, 30 and 29 degrees C, in that order. The hypothesis that increased seawater temperature causes increases in growth rate was thus not supported. The cell toxicity and car bohydrate production of O. ovata were highest at the temperature range that is optimal for cell growth. Increasesing sea surface temperature, as a result of global warming, is therefore not likely to have a substantial effect on the bloom formation and toxicity of this Japanese strain of O. ovata. (Less)
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author
publishing date
type
Contribution to journal
publication status
published
subject
categories
Higher Education
in
Aquatic Microbial Ecology
volume
65
issue
3
pages
261 - 270
publisher
Inter-Research
ISSN
0948-3055
DOI
10.3354/ame01555
language
English
LU publication?
no
id
595b239c-9098-4f60-9439-415cebafef90 (old id 7994209)
date added to LUP
2015-09-29 11:20:02
date last changed
2016-06-29 09:13:59
@article{595b239c-9098-4f60-9439-415cebafef90,
  abstract     = {Ostreopsis ovata is a benthic dinoflagellate that produces palytoxin and its analogues. Since the end of the 1990s, toxic blooms of O. ovata have been recorded in many tropical and temperate marine waters. These blooms often kill benthic invertebrates and cause health problems for humans. We hypothesize that increases in seawater temperature might induce these blooms. A strain of O. ovata isolated from the southern coast of Japan was selected for study. O. ovata cells were exposed to 7 different temperatures from 24 to 30 degrees C for 30 d, and growth rates were noted. The specific growth rate was found to be highest at 25 degrees C, next highest at 24 degrees C and lower at 26, 28, 27, 30 and 29 degrees C, in that order. The hypothesis that increased seawater temperature causes increases in growth rate was thus not supported. The cell toxicity and car bohydrate production of O. ovata were highest at the temperature range that is optimal for cell growth. Increasesing sea surface temperature, as a result of global warming, is therefore not likely to have a substantial effect on the bloom formation and toxicity of this Japanese strain of O. ovata.},
  author       = {Vidyarathna, N. K. and Graneli, Edna},
  issn         = {0948-3055},
  language     = {eng},
  number       = {3},
  pages        = {261--270},
  publisher    = {Inter-Research},
  series       = {Aquatic Microbial Ecology},
  title        = {Influence of temperature on growth, toxicity and carbohydrate production of a Japanese Ostreopsis ovata strain, a toxic-bloom-forming dinoflagellate},
  url          = {http://dx.doi.org/10.3354/ame01555},
  volume       = {65},
  year         = {2011},
}